The effect of particles on creep rate and microstructures of granular ice
Authors: Song, Min; Baker, Ian; Cole, David M.
Source: Journal of Glaciology, Volume 54, Number 186, July 2008 , pp. 533-537(5)
Publisher: International Glaciological Society
Abstract:The microstructures of particle-free granular freshwater ice and ice containing 1 wt.% of 50 ± 10 mm uniformly distributed particles were investigated before and after compressive creep to ∼10% strain with stresses of 1.45 MPa at −10°C and 0.4 MPa at −5°C. Creep rates of particle-containing ice were always higher than those of particle-free ice. For an initial stress of 1.45 MPa at −10°C, dynamic recrystallization occurred with new grains nucleating and growing along grain boundaries for both sets of specimens, and the ice with particles showed a higher nucleation rate. Under creep with an initial stress of 0.4 MPa at −5°C, dynamic recrystallization also occurred by the nucleation and growth of new grains along the grain boundaries for ice containing particles, but recrystallization in the particle-free ice occurred through grain boundary migration.
Document Type: Research article
Publication date: 2008-07-01
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